A practical workflow from a correctly seated straight or angulated Multi-Unit abutment through an MUA-level digital reference to direct-to-MUA design, a verification prototype and the definitive screw-retained restoration.
MUA platform
Primary MUA fixation
Digital referenceA scan body transfers into CAD the position of the prosthetic platform physically beneath it. The digital workflow therefore starts before the scan, with correct MUA selection, complete seating, the appropriate instrument and the torque specified for the exact reference.
For angulated MUA with a primary Unigrip screw, select the instrument length according to access and working depth. The IPD catalogue lists overall lengths of 18, 25 and 32 mm.
Practical guide to usable reach:approximately 8 / 14 / 23 mm.*
Unigrip in the e-shop
A straight Multi-Unit is inserted via the external hex on its coronal portion. The system instrumentIPD/LL‑AB‑00has a HEX 2.0 working profile and an overall length of 20 mm.
The adapter connects RA-shank instruments to a ratchet with the corresponding eye. In practice, Ø7 mm covers a large proportion of commonly used instruments, but ratchet-eye diameter is not a universal standard.
C1030 in the e-shop
If the torque ratchet has a larger eye, use the corresponding Ø8 mm adapter. Before clinical use, always verify full insertion of the RA shank and secure engagement of the adapter physically.
C1031 in the e-shopIPD publishes different torque values according to implant system, platform and exact Multi-Unit reference. It is therefore not safe to assign one universal value to all straight MUA or one universal value to all angulated MUA.
Once the MUA has been definitively seated, its position is transferred into CAD at theMulti-Unit level. This is fundamental: an implant-level scan body cannot simply be “switched” to MUA later in CAD because the actual position of the abutment would never have been measured.
An anti-rotational scan body for RP Ø4.8. It is appropriate where rotational orientation must be transferred and the specific MUA / library supports this indexed workflow.
A rotational, non-engaging scan body for RP Ø4.8. This is a typical pathway for splinted restorations on multiple MUA where an anti-rotational index at each individual interface is not desired.
In a full-arch case, the way the scanner transfers relationships between distant MUA positions may be more important than the local scan body alone. Scan Transfer creates an additional physical reference pathway for full-arch protocols and uses its own corresponding library branch.
Both branches can lead to an IPD prosthetic solution, but they do not start from the same scanning geometry.
Option names may differ between Exocad and library versions, but the geometric logic remains the same. The key requirement is that every step represents the same physical MUA platform.
Load the STL/PLY data according to the scanner used, together with the opposing arch and bite. Before matching, verify that the MUA scan bodies were fully seated and are clearly captured in the data.
Use TECH for IPD scan-body geometry and LITE only for a supported OEM/third-party MUA scan body. Distinguish engaging from non-engaging. In a full-arch case, the wrong library can produce a very precise wrong result.
Do not rely on automatic best-fit alone. Check the seating of the library geometry on each scan body, its orientation and consistency across all positions. If one position does not match, do not solve it by globally “averaging” the entire restoration.
Depending on the library, the workflow may use a direct MUA interface, a direct-to-MUA PMMA/provisional branch, a Ti-base / interface or a supported ASC option. The choice must match the definitive material and the fixation screw being used.
In a full-arch restoration, assess not only aesthetics but also instrument access to each screw, sufficient material around the channels, connector cross-sections, gingival clearance and access for clinical hygiene.
Inspect the restoration from the basal side and verify every MUA interface, rotational logic, screw-channel axis and any ASC support. Only then export the manufacturing file.
A mock-up usually describes an aesthetic or functional simulation. If the aim is to verify whether a digitally designed MUA restoration physically seats without obvious internal strain, “verification prototype” or “verification framework” is more precise.
If the library provides a direct-to-MUA PMMA/provisional branch, a physical prototype can be produced before definitive milling or printing. It can be used to assess seating on the MUA, screw-channel access, restoration volume, occlusion and, according to the clinical protocol, passive fit using, for example, the one-screw / Sheffield principle.
The same general principle of physical verification can also be used with animplant-level model before fabrication of a removable PSD restoration. In that workflow, however, the verification jig does not verify the definitive restoration or the position of the PSD attachments; it verifies whether the physical model reproduces the relative implant positions accurately enough to proceed safely.
After successful verification, fabricate the definitive restoration using the same library and component branch that was verified with the prototype. During final tightening, again distinguish the primary implant–MUA connection from the secondary restoration–MUA connection.
Torque and instrumentation are determined by the exact MUA reference. Straight and angulated MUA may require different insertion methods and tightening torques.
For the standard AB Multi-Unit RP Ø4.8, IPD specifies forIPD/AB‑TR‑00Unigrip and 15 Ncm. Other screws, including TPA/ASC variants, may require different instruments and rules.
No. A straight MUA uses an instrument for the external HEX 2.0, typically IPD/LL-AB-00. For angulated MUA with a primary Unigrip screw, use the corresponding Unigrip instrument. The exact MUA reference always takes precedence over a general rule.
No. Current IPD product data vary between compatibility families. Before clinical use, identify the exact REF and verify the current value.
AB-SR-00 is engaging and transfers rotational orientation; AB-SR-01 is non-engaging. For splinted multi-unit restorations, a rotational/non-engaging logic is typically required, whereas an engaging branch may be relevant for a single crown if supported by the specific MUA and library.
When reliable relationships between distant MUA positions are critical in a full-arch case and you want to work with a rigid physical reference pathway. Scan Transfer has its own protocols and corresponding library workflow.
TECH is for IPD scan-body geometry. LITE is for supported OEM / third-party scan bodies. In both cases, the MUA level must actually have been scanned when designing on MUA.
For geometric verification, “verification prototype”, “verification jig” or “verification framework” is more precise. If the complete trial restoration is being tested in resin/PMMA, “prototype try-in” or “verification provisional” can be used.
We can help verify that the instrument, torque, engaging/non-engaging scan, TECH/LITE library, direct-to-MUA option and final screw form one consistent workflow.
This technical web presentation does not replace the current instructions for use. For torque, sterilization, indications and compatibility, the exact reference and current manufacturer documentation always govern.
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